The O-U has just released a list of many popular cereals under its hasgacha with the appropriate bracha rishona and bracha achrona according to the ruling of HaRav Chaim Yisroel Belsky, Shlita.
Please make a copy, put on your refrigerator, and distribute to your friends and family.
Also, refer to the Star-K listing of cereals brachos which include many of the O-U cereals in the above list but includes a number of OK and plain K (Kellog’s) certified ones too.
Please see the following link: http://tinyurl.com/b5f8qtt
We recommend that this valuable list be further distributed to your shul and/or yeshiva in order to avoid the recitation c’v of brachos levatalos, and in order to bring the proper hashpa’ah and shefa into the world by reciting the correct and proper bracha over the food that you are about to eat or have eaten. In the zechus of your further promulgation of this list…may you be zoche to brachos ahd bli dai!